Distance control system.



L. R. KRUMM.y msTANeE CONTROL SYSTEM.

APPLIOATION FILED AUG. 21, 1909.

' Patented Sept. 19, 1911.

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L. R. KRUMM. DISTANCE CONTROL SYSTEMf APrLIoATIoN FILED AUG. 21, 1909.

1,003,919. l Patented sept. 19,'1911.

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N l y J/zwfziar UNITED sraans Barnier dreien.,

LOUIS R.. KEUMM, OF'OLIIMBUS, OHIO.

i DISTANCE CONTROL SYSTEMo i To all whom it mayroncem:

Be it known that I, LoUIs R.. KRUMM, a citizen of the United States ofAmerica, and resident of Columbus, county of Franklin, and State ofOhio, have invented a new and useful Improvement in Distance ControlSystems, of which the following is a speciication.

My invention pertains to systems and apparatus for controlling electricmotors from a distance, and for operating search lights by motors thuscontrolled. I provide for a search light two motors, one for elevation,and oney for traverse control, the two motors being independent. Inconnection with the two independent motors, I provide two similarsystems of motor control.

It is the object'ofmy-jinvention to provide means for moving thesearehlight in any` direction and 'at any desired speed, and at the same timeto provide guardin 'features whereby the apparatus involved will beprotected automatically against injury by inadvertent control.` For eachmotor I provide starting and stopping means and speed changing means. j

The system of my invention is shown in two sheets of drawingsaccompanying, inA

' wheels adjacent to them. Shaft 43 1s formed which'- w.

Figure 1 shows the controlling portion of the system, and Fig. 2 thecontrolled portions. Fig. 3 shows a section of the shaft 43 taken at aportion of its length not engaged in a journal.

The details shown in Fig. l are combined into one piece of apparatus,the handles 1 i and 2 being adapted to operate in directionscorresponding to thev resulting movement of the beam of light; 100 isthe travf erse motor whch controls the movement of the arc light. inthe. horizontal direction, the motor 100 being controlled by contacts ofthe polarized relay 10 which in turn'is controlled by the contacts ofthe lever I.

- iiorthis reason the lever 1 moves in a horizontal direction to closecircuit with its contact points while the lever 2 moves in a verticaldirection to close circuits with its contact points; the lever 2controls polarized relay 2O which in turn controls elevating motor 200.rlhe keys 1l-12-21-22, which control the speed of the motors arecombined in the apparatus of the main governing handle so that thesearch light can be controlled by one hand if desired. The con-Specication of Letters Patent. Patented Application filed August 21,1909. Serial o. 513,947..

Sept. 19, 1911.

trolling deviceoperates over four wires, 13, 23, 14, 24, with earthreturn.l rCurrents of different polarit-ies or direction of flow aresent over these wires depending upon the manipulation of the levers 1and 2 and of ,the keys11-12-21-22. The keys 11 and 12 are mechanicallyintegral as thesymbol shows, it being impossible to closegbothbf them atthe same time, the doublefdey-thus being adapted to connect itswiref-.to the positive sideof battery 31 or to the negative s1de ofbattery 32 as desired, but not te, both. Polarized relay 15 is operatedby keg@ 1 1 or 12. 16 and 17 are relays shown as of solenoid type. 40,41 and 4 2'are electromagnets. 43 is a main speed controller shaft onwhich are mounted two disks, disk 44 presenting a crown ygear on bothfaces and dlsk 45 presenting a crown gear on its lower face. The shaft43 also carries the brush arm 46 which controls the Veffective Value ofthe variable resistance 47. v rotatewith the shaft 43. The disks 44 and.45 normally occupy the position shown but are slidable upon the shaft43 under control vof the electromagnets 40, 41 and 42, so that they maybe thrown into contact or out of AJcontact with constantly. revolvinggear as shown in Fig. 3, for the portion of its length not utilized as ajournal. When the electromagnet 40 is energized, disk 44 is moved intoengagementfwith driving pinion W hen the electromagnet 41 is energized,

.disk 44 is moved into engagement with revolving pinion 51. When theelectromagnet 42 is energized, disk 45 is drawn out of position forVengageinent with revolving pinion 5,2. yPinions 50, 51 and 52 aredriven continu- The elements 44, 45 and 46 i ously by speed controllingdriving shaft 53 which is driven by motor 54 connected to the mains 30,33 by switch 55. 47 is a resistance in series with the armature of motoror otherwise related to the motor 100 in such manner as to control itsspeed. The 100 brush 48 engages the resistance 47 to vary its effectivevalue 'Ihe traverse motor 100 is shown with its field permanently closedduring operation over the circuit wires 56 and through switch 55 to themains 3() and 105 33. `With the 'apparatus in the position shown in thegures, the main switches are closed and motor 54 is running continuouslyand driving continuously the pinions 50, 51,

52, these revolving all in the same angular direction. The operation ofpinion 52 is to engage disk 45 when that disk is released byelectromagnet 42 and to restore the disk 45, the shaft 43 and the arm 48to normal position until variable resistance 47 is at its greatesteffective resistance value, after which time thepinion 52 does not movedisk 45 although the pinion continues to revolve. fllhis may be eifectedby omitting'the teeth of the crown gear at such point that it is notengaged by pinion 52 when disk 45 is in its normal position. Theswitches 60 and 61 are off-normal switches and yare closed when the disk45 is in its normal position or when the disk 45 is attracted by theelectromagnet 42. As the contact 6() controls the circuit ofelectromagnet 42, it will be noted that when the electroxnagnet 42 isdenergized, the disk 45 will drop upon the pinion 52, breaking theswitch 6() and that electromagnet 42 can not be energized again untilrestoration to normal of' shaft 43 and brush 48 has been effected,thereby l mechanically closing switch 60. y

The operation of the system is as follows: rllhe operator in charge ofthe keys of Fig.

'1 desiring to swing the search light to the left, will move thecontrolling lever 1 to the left, thereby closing connection betweenconductor' 13 and battery 31. Current- Hows v from earth through battery31, lever l, conductor 13, and relay 10, moving the armature of relay l0to the lett and closing a path over which lcurrent flows from power wire30 through 34, and 35, armature of relay 10, helix of relay 16,conductors 37 and 36 to power conductor 33. 'llhis operates relay 16,and closes circuit from power wire 30 through conductors 34 and 38,armature and front contact oit relay 16, armature and back contact ofrelay 17 conductor 39 to a junction point near 42,

whence it flows through helix of relay 42,. -switch 60 and conductor 62to a junction point near armature of traverse motor 100, flowing alsofrom the first junction point through switch 61, brush 48, resistance47, armature of motor 100 to the second junction point, thence overconductor 63, front contact of relay 16, and conduc-l tors 64, 37, 36 topower conductor 33. Elec 'tromagnet 42 is energized and traverse motor100is started in such direction as to move the beam of t-he are lamp tothe left as desired bythe operator controlling the handle 1.- The motor100 is movin-g at its 'slowest speed since resistance 47 has its highesteffective value. To increase the speed of theI notor and therefore theangular speed of movement of the arc light, the operator closes vkey 12which permits current How over a path including earth, battery 32, key12, wire 14 and helix .of relay 15, moving armature of relay 15 to theright and closing `ing armature of relay path for current over 30,.

noname 34, es, 16, 17, 39, ci, c5, 15, ec, fio, e2, ce, 16, 64, 37, 36,38, energizing electromagnet 40, and drawing disk 44 into engagementwith pinion 50 which rotates shaft 43 to move the brush 48 olil normalto reduce the eifectire resistance oi' 47, thereby increasing the speedof motor 100. `When the speed of the motor 100 has increased to thespeed desired by the operator, the key 12 is relea-sed, but the lever 1is maintained against its left contact. The electromagnet 40 isdeenergized but the electromagnet 42 is held energized, thus stoppingthe movement of the brush 48, but continuing the rotation of the motor100 so long as desired. lit' it is desired later to decrease the speedof the motor 100, the operator closes key 11, thus sending current fromearth through battery 31, key 11, conductor 14 and relay 15 mov- 15 tot-he left and energizing electroinagnet 41, drawing disk 44 intoengagementwith pinion -51 which results in rotating shaft 43 in reversedirection toward its normal, moving brush 48 and increasing theeffective resistance of 47, thereby reducing the speed of motor 100. Thespeed of motor 100thus may be set where desired from its minimum to itsmaximum by control of keys 11 and 12. lt it is desired to reverse' thedirection of rotation of motor 100 to reverse the direction or' movementof thesearch light, the handle 1 is reversed and pressed against itsright hand contact. As it leaves its left hand contact, the circuit overwire 13 is broken,

relay 10 is de'energized, relay 16 is denergized and electromagnet 42 isdenergized. Relay 10 immediately is energized to close its contacttoward the right and relay 17 immediately is energized to change itsarmature contacts, but circuit will not be closed through the armatureof motor 100 until inion 52 connectingwith t-he released disk 45 shallhave restored position, thereby moving brush 48 to normal position,restoring resistance 47 to its greatest effective value and closingoil-normal switches 60 and 61. When this has been done current will betraced from power wire 30 through elements 34 and 67, front contact ofrelay 17, back contact of 'relay 16,

disk 45 to normal y conductor 68, armature of motor 100, re-

key 12 or @sie y a M speed controller may 'be of any de- .contrellingdevices; a vmotor; and motor i sire fundamental princip or mechanicalcontrolling devices adapted to start and stop 1 form. said motorinresponse to control by cur lIn `my improved system but tive conductorsare required between the point of control and the Search light orbut'three wires between the point of control and any` single motor, oneof which 1n either case may be earth if desired.. It is impossible toclose the armature circuit except through maximum resistance, or othercondition sei curing the lowest rate or speed of motor, thus insuringthat every time the motor is started, which may be in the reverse din yrection from previous motion, all circuit conditions are normal andproper for the reverse start.

The speed controllin circuits are oper ated through relays o? thedircction-con trolling devices, and a reversal of the direction of themain motor involves restoration at the controlled station of all speedcontrolling conditions, regardless of any conditions which inadvertentlymay be maintained at the controlling station.

The disk 45 has its friction band or crown gear or other means ofengagement with pinion 52, discontinuous in such way that; the disk 45will be disengaged from pinion 52 when resistance 47 is a maximum. Thedisk 44 similarly disengages mechanically from its driving pinions 50and 5l when the resistance 47 has been reduced to a minimum and themotor 100 is at its greatest speed.

' The shaft 43 has the duty of controlling the speed of motor 100. Ihave shown a variable resistance in series with the armature as a meansby which the speed of the motor l0() is controlled, the means beingcontrolled in turnby the shaft 43. Any

known means of varying motor speed may be used, the selected means beingcontrolled by the angular positions of the shaft 43.

The governing apparatus is such in design that it mayk be operated fromthe same source of current as that supplying the Search light.

While I have shown a complete system ,of a search light controlled byelevating and traversing motors, I may use a single motor for anypurpose as, for instance, in elevator work, or a pumping enginecontrolled from the lire hose nozzle, and control it by three conductorsas described 'ully in connection with traversing motor l00.

Having thus described my invention what I claim as new and desire tosecure by United States Letters Patentis:

l. In a distance control system, a controlling device comprising twotwo-way keys, each adapted to connect its main switch element witheither oia two batteries of opposite polarities; two conductorsconnecting said main switch elements to motor currents over the other ofsaid conductors.

2. In a distance control system, a motor; a speed-governing device; anoE-normal switch associated with said speed-governing device; and astarting circuit for said motor and including normally. closedoil-normal contacts.

3. In a distance control system, a speed-governing deviceI for saido-normal switchl associated with said speed-governing device; a startingcircuit for sald motor and including a normally closed contact of saidoil-normal switch; means for'operating device to move it out of normalposition; and further means for maintaining said contact while saidspeed-governing device is out of a normal posltion, andwhilesaid motoris. controlled by said starting circuit to continuous rotation.

4. In a distance control system, a motor; a source of current forsaidmotor; a system of relays for starting said motor and adapted tocontinue the movement of said motor during the continuation ofenergizetion of the starting relays of said system; and means forchanging the speed of said motor, said speed changing means beingoperative through contacts of said starting relays closed when saidmotor is running.

5. In a distance control system, a controlling device comprisingswitches and sources of currents, said switches being adapted toselectively connect said sources of currents to controlled portion ofsystem;

a motor;

a motor; a rheostat; an oit-normal switch for said rheostat; and astarting circuit for said motor and including a normally closed contactin said ott-normal switch.

6.' In a distance control system, a controlling device comprisingswitches and sources of currents, said switches being adapted toselectively connect said sources of currents to controlled portion ofsystem; a motor; a speed-controlling device; an l normal switch fordevice; and a starting circuit for said motor and including a normallyclosed contact in said oil-normal switch.

7. In a distance control system, a controlling device comprisingswitches and sources of currents, said switches being adapted toselectively connect said'sources of currents to controlled portion oitsystem; a motor; a rheostat; an Aodnormal switch for said rheostat; anda starting circuit for said motor and including a normally closedcontact in said odi-normal switch; andan motor; an

said speed-governing loe said. speed controlling ist i,oo3,eie

velectromagnet energized by current in the said starting cui-cuit andadapted to hold said contact closed.

8.1n a distance control system, a controlling device comprising switchesand sources of currents, said switches being -'.'adapted to selectivelyconnect said sources of currents to controlled portion of system; amotor; a speed-controlling device; an olt- Mlnormal switch for saidspeed-controlling device; and a starting circuit for said motor andincluding a normal-ly closed contact in said oif-nor1nal switch; and anelectromagnet energized by current in the said l5I starting circuit andadapted to hold-said contact closed.` l n 9. ln a distance controlsystem, a motor; starting and stopping means for said motor;speed-governing means for said'motor;

ltwo conductors anda counnon return from a distant point ot' control;and mechanisms whereby currents over one of said conductors operate tocontrol the starting, continuance of rotation., and stopping of saidlniotor in either of its two directions of ro.-

tation in accordance with the presence and direction of current passingover said conductors; and whereby currents over the other of saidconductors control the speed Btl ofrotation of said motor, increasingthe speed in response to currents in one direction and decreasing thespeed 1n response to currents in the other direction Withinprel''determined speed limits.

S5 l0. lny a searchliglitcontrol system, yInotors adapted respectively'to impart transverse and elevation movements to said searchlight,controllers for said motors, and constantly rotating means adapted tooperate said controllerg and means controlled at a distance for applyingsaid rotary means to said controllers.

11. In a searchlight control system, inotors adapted respectively toimpart transverse and elevation movements to said searclilight,controllers for said motors .and constantly rotating means adapted tooperate said controllers; distant control meansy comprising in partswitches and sources 'of currents, said switches being adapted toselectively connect said sources ot currents `to means adapted to applysaid rotary Louis n. nieuwe..

'Witnesses GEO. A. Soovinnn, -WM S. ULMnn.

